I just bought this wheelset for my Giant Defy SL0. Amazing tubeless ready wheelset. I have Dura Ace tubeless on my other bike and these outperform the dura ace hands down. They are listed at 1390 gm and sorry I did not have them weighed before they were put on my bike. They want to spin and climb. Much stiffer than the dura ace. I like them on the flats in that they want to roll. I really like DT swiss hubs and these have DT swiss hub internals. I have ridden on Fulcrum zero two way fit wheels. I think these are almost as stiff. Giant advertises these wheels as made for the fork on my bike ("wheel system"). They are so smooth and I am not sure if this because of the wider rim and more tire surface. I run them tubeless. Retail is $1000 but I got them for $800. Amazing wheelset. Especially for the money.